JPS646479Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cover that protects the turbine housing of a supercharger, which is provided in the exhaust system of an internal combustion engine, from direct contact by a user or worker.

Conventionally, in the case of this type of protective cover, the exhaust system has an exhaust manifold 1 as shown in Fig. 1, for example.
A manifold cover 4 is attached by bolts 6 to the upper part of the exhaust manifold 1, which is a part that is likely to be touched by users. Furthermore, a turbine housing cover 5 is attached to the upper part of the turbine housing 2 by a nut 7. In the case of the turbine housing cover 5 in the above configuration, since the turbine housing 2 is a standard product, there is no boss etc. for attaching the cover 5 to an arbitrary position, so the turbine housing 2 is fixed to the exhaust manifold 1. The mounting portions 5A and 5A of the cover 5 are jointly attached to this portion by using the nut 7 that fixes the exhaust pipe 3 to the turbine housing 2. However, the screwing part of the nut 7 is located at the end of the turbine housing 2, so the cover 5 that covers the entire upper part of the turbine housing 2 is also fixed by the nut 7 only at the end, and the cover 5 is floating. Because of this condition, the vibrations caused by the operation of the internal combustion engine or while the car is running are amplified at the tip of the cover 5, and a large moment is applied to the attachment part 5A of the cover 5, causing damage to the attachment part 5A, loosening of the nut 7, and the like. Turbine housing 2 and exhaust manifold 1 or exhaust pipe 3
A serious problem arises in that exhaust gas leaks from the boundary between the turbine housing 2 and the turbine housing 2. Furthermore, the panel-shaped cover 5 obstructs heat radiation from the turbine housing 2, resulting in a problem in that the turbine bearings in the turbine housing 2 seize.

The purpose of the present invention is to solve the above-mentioned conventional problems, and its main feature is to protect a high heat source with a knitted material of elastic wire.

The present invention will be explained with reference to an embodiment shown in FIG. 2 and subsequent figures.

In FIG. 2, the exhaust system includes an exhaust manifold 1, a turbine housing 2, and
The turbine housing 2, the exhaust manifold 1 and the exhaust pipe 3 are composed of flanges 8A and 9A of the turbine housing 2 and flanges 8B and 9B of the exhaust manifold 1 and the exhaust pipe 3, respectively.
are superimposed and fixed at each of the four corners with nuts 7. Reference numeral 10 denotes a protective cover for the turbine housing. The protective cover 10 consists of a mounting portion 11 and a protective portion 12. The protective portion 12 is formed by spot welding an elastic wire 16 in the front-rear direction and an elastic wire 17 in the left-right direction. Consists of a grid-like structure,
The wire rods located at both edges of the elastic wire rod 17 in the left-right direction have both ends extended to form a frame portion 15, and are bent downward to form a mounting portion 11 consisting of leg-like portions 13 and 14. . Leg-shaped portion 1 of the attachment portion 11
3 is formed with a pair of downward loop-shaped protrusions 18, 18, and the leg portion 14 is formed with a pair of opposing U-shaped insertion portions 20. The protective cover 10
The leg portion 13 is connected to the exhaust pipe 3 of the turbine housing 2.
The leg portions 14 are arranged on the connection side, that is, on the flanges 9A and 9B side, and the leg portions 14 are connected to the flanges 9A and 9B of the turbine housing 2.
9B and mounted on the turbine housing 2 with a single touch, and the leg-shaped parts 13, 1
It is fixed by the elasticity between 4. The loop-shaped protruding portion 18 of the leg portion 13 is connected to the flanges 9A, 9.
The U-shaped insertion portion 20 of the leg portion 14 is inserted into the turbine as shown in FIG. It is elastically pressed along the annular outer peripheral edge 21 defining the protruding end surface 2A of the housing 2. Furthermore, the width between the root portions 22 and 23 of the leg portions 13 and 14 that are in contact with the frame portion 15 is equal to the width of the flange 9 of the exhaust pipe 3.
The width between the ends 2A and 2A of the turbine housing 2 is made equal to or slightly wider, and the width between the tip ends 24 and 25 of the leg portions 13 and 14 is made slightly narrower than that.
The elasticity of the legs 13 and 14 of the protective cover 10 effectively acts to firmly compress the legs, and even if there are variations in the dimensions of the exhaust pipe 3 and the turbine housing 2, especially on the increasing side, the legs 13 and 14, excessive deformation is prevented and no permanent deformation remains. Further, the insertion portion 20 of the leg portion 14 has a U-shape and a handle portion 28.
is formed to facilitate attachment and detachment of the protective cover 10 and prevent abnormal deformation of the leg portions 14.
The width of the root end portion 26 of the letter shape is the width of the turbine housing 2.
The width of the outer peripheral edge 21 of the protruding end surface 9 is made equal to or slightly wider than that, and the width of the U-shaped tip portion 27 is made slightly narrower than that, so that the elasticity of the insertion portion 20 acts effectively and the outer peripheral edge Since the insertion portion 20 is firmly crimped onto the grip portion 21 and the stress exerted on the handle portion 28 is small, no permanent deformation remains.

In the above configuration, as described above, the protective cover 10 can be attached to the turbine housing 2 with a single touch.
is elastically compressed by the legs 13 and 14 of the protective cover 10, and the loop-shaped protrusion 18 of the leg 13 surrounds the nut and connects the exhaust pipe 3 around it.
The U-shaped insertion portion 20 of the leg portion 14 is elastically crimped into the recess 19 of the turbine housing 2, and the U-shaped insertion portion 20 of the leg portion 14 is elastically crimped along the outer peripheral edge 21 of the protruding end surface 9 of the turbine housing 2. There is no fear that the protective cover 10 will fall off from the turbine housing 2 even if vibrations are exerted on the protective cover 10 during driving or running the vehicle. Furthermore, since the protection part 12 is organized in a lattice shape by the elastic wires 16 and 17, it has high rigidity but is lightweight and does not generate abnormal vibrations due to resonance with vibrations from the outside. Furthermore, when the internal combustion engine is operated, exhaust gas flows to the exhaust manifold 1, the turbine housing 2, and the exhaust pipe 3, and heats the maximum outer periphery of the turbine housing 2 in particular at the center. This protects the user's hands from directly touching this part and does not obstruct air circulation, so the turbine housing 2 does not overheat. In addition, the protective portion 12 of the protective cover 10
By integrally forming the protective cover 10 and the mounting part 11, there is no welded part between the protective part 12 and the mounting part 11, and there is no need to worry about poor welding or a decrease in the elastic force of the wire due to welding heat, and the protective cover 10 can be securely fixed. It will be installed. Furthermore, if you select a heat-resistant material with low thermal conductivity, such as a heat-resistant synthetic resin such as epoxy resin, or a metal wire whose surface has been treated with a glass layer, etc., as the wire material for the mounting part, heat will be less likely to be transmitted to the protective part. The turbine housing can be maintained at a low temperature, and the durability of the contact portion of the mounting portion with the turbine housing is improved. Furthermore, if the entire protective cover is made of knitted stainless steel wire, a highly durable protective cover with excellent heat resistance, corrosion resistance, and rich elasticity can be obtained. If it is made smaller, the thermal conductivity will also be reduced.

Since the present invention has the above-mentioned configuration, the protective cover can be firmly attached to the turbine housing with one touch due to the elasticity of the attachment part without providing any particular attachment means to the turbine housing, and since it is extremely lightweight, it can be easily attached from the outside. The protective cover does not easily resonate with the vibrations of the turbine and will not fall off from the turbine housing.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a conventional example, Fig. 2 and subsequent figures show an embodiment of the present invention, Fig. 2 is a perspective view from the exhaust pipe side, and Fig. 3 is a perspective view from the opposite direction of Fig. 2. FIG. In the figure, 1... Exhaust manifold, 2... Turbine housing, 3... Exhaust pipe, 10... Protective cover, 11... Mounting part, 12... Protective part, 13, 1
4... Leg-shaped portion, 15... Frame portion, 16, 17... Elastic wire rod, 18... Protrusion portion, 20... Insertion portion, 2
2, 23... Root part, 24, 25... Tip part,
26... Root end portion, 27... Tip portion.

Claims (1)

[Claims for Utility Model Registration] (1) A flange is formed on one side, and the exhaust pipe is connected by overlapping the flange and the flange of the exhaust pipe and fixing the four corners with bolts and nuts, and the exhaust pipe is connected to the flange on the other side. A protective cover covering a turbine housing having a protruding end surface defined by an annular outer peripheral edge, the protective cover having a protective part organized in a lattice shape of elastic wires, and a protective part formed from both edges of the protective part. It consists of a mounting part consisting of a pair of leg-like parts formed by extending and hanging an elastic wire, and on the exhaust pipe connection side of the turbine housing, the leg-like parts have a flange of the turbine housing and a flange of the exhaust pipe. A downward loop-shaped protrusion is formed that surrounds and elastically presses the upper pair of bolts or nuts that fix the bolts or nuts; A pair of opposing U's that press against each other along the part surface
A protective cover for a turbine housing, characterized in that a letter-shaped insertion portion is formed. (2) The protective cover for a turbine housing according to "Utility Model Registration Claim (1)," in which the elastic wire constituting the mounting portion is made of a heat-resistant material with low thermal conductivity. (3) The mounting portion has a width that is equal to or slightly wider than the width of the turbine housing between the root portions that contact the protective portion, and a width that is slightly narrower than the width of the turbine housing. A protective cover for a turbine housing as described in "Claims (1) and (2) of Utility Model Registration." (4) The elastic wire is a stainless steel wire and is organized into a lattice shape by spot welding to form a protective section.
Protective cover for the turbine housing as described in (3).